. >> they have laid out clearly, they say, that what barack obama and joe biden did is they've endangered medicare, they've stole money from medicare, and they've done it to get obamacare and all this, and you see in the ads, and you hear it in everything they say. nothing could be further from the truth. >> next thursday night, october 11th, congressman paul ryan and vice president joe biden will face off in their only debate. abc news' martha rad dismoderates from center college in danville, kentucky, and you can watch and engage with c-span with our live debate preview at 7 p.m. eastern followed by the debate at 9. and your reaction, calls, e-mails and tweets at 10:30. follow live coverage on c-span, c-span radio and online at c-span.org. >>> this month as the presidential candidates meet for debate, we're asking middle and high school students to send a message to the president as part of in this year's c-span's student cam video documentary competition. in a short video, students will answer the question, what's the most important issue the president should consider in 2013, for a ch